AT72267B - Circuit arrangement for fire alarm systems. - Google Patents

Circuit arrangement for fire alarm systems.

Info

Publication number
AT72267B
AT72267B AT72267DA AT72267B AT 72267 B AT72267 B AT 72267B AT 72267D A AT72267D A AT 72267DA AT 72267 B AT72267 B AT 72267B
Authority
AT
Austria
Prior art keywords
fire alarm
loop
telephone
circuit arrangement
subdivision
Prior art date
Application number
Other languages
German (de)
Original Assignee
Siemens Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT72267B publication Critical patent/AT72267B/en

Links

Landscapes

  • Alarm Systems (AREA)
  • Fire Alarms (AREA)

Description

  

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   PATENT ANSPRÜCHE :
1. Feuermeldeanlage, bei der eine Reihe von Feuermeldern in einer gemeinsamen Schleife liegt und von den Meldern aus nach der Zentrale telephoniert werden kann, dadurch gekennzeichnet, dass jeder Feuern elder mit einer Lautfernsprecheinrichtung ausgerüstet ist, die durch eine von der Feuermeldeschleife getrennte, für die   lantfemsprerbeinrichtung   aller Melder jedoch 
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   PATENT CLAIMS:
1. Fire alarm system, in which a number of fire alarms is in a common loop and can be telephoned from the detectors to the control center, characterized in that each fire elder is equipped with a loudspeaker which is separated from the fire alarm loop for the lantfemsprerbeinrichtung all detectors, however
 EMI2.2

Claims (1)

eines Melders eine Unterteilung der mehradrigen Telephonleitung in der Weise erfolgt, dass je zwei Adern an ein Mikrophon und die Enden der in ihrer Mitte geerdeten Telephonwicklung angeschaltet werden. a detector, a subdivision of the multi-core telephone line takes place in such a way that two cores are connected to a microphone and the ends of the telephone winding grounded in their center. 3. Feuermeldeanlage nach Anspruch 1 und 2. dadurch gekennzeichnet, dass zwecks Aufrechterhaltung des Sprechverkehres bei Drahtbruch in jedem Melder zwei Mikrophone angeordnet sind, denen zwei Hörer in der Zentrale entsprechen, und die an die Lautfemsprecheinr'chtung des molders'bel Herstellung einer Verbindung angeschaltete Induktionsspule des Mikrophons in der Zentrale in ihrer Mitte an Erde gelegt werden kann. 3. Fire alarm system according to claim 1 and 2, characterized in that two microphones are arranged in each detector in order to maintain speech communication in the event of a wire break, which correspond to two listeners in the control center and which are connected to the loudspeaker device of the molders'bel making a connection Induction coil of the microphone in the control center can be connected to earth in the middle. 4. Feuermetdeantage nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass in der Ruhelage die Lautfernsprecheinrichtung von der Telephonschleife abgeschaltet ist und diese eine geschlossene Schleife bildet, die unter Ruhestrom gcstellt ist, der durch die Unterteilung der Schleife bei der EMI2.3 4. Feuermetdeantage according to claim 1 to 3, characterized in that in the rest position the loudspeaker device is switched off from the telephone loop and this forms a closed loop which is gcetzt under quiescent current that is caused by the subdivision of the loop in the EMI2.3
AT72267D 1914-05-01 1915-04-27 Circuit arrangement for fire alarm systems. AT72267B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE72267X 1914-05-01

Publications (1)

Publication Number Publication Date
AT72267B true AT72267B (en) 1916-08-25

Family

ID=5636085

Family Applications (1)

Application Number Title Priority Date Filing Date
AT72267D AT72267B (en) 1914-05-01 1915-04-27 Circuit arrangement for fire alarm systems.

Country Status (1)

Country Link
AT (1) AT72267B (en)

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